EP0607427B1 - Cristaux liquides de diphenyle-diacetylene asymetriques non polaires et melanges eutectiques - Google Patents
Cristaux liquides de diphenyle-diacetylene asymetriques non polaires et melanges eutectiques Download PDFInfo
- Publication number
- EP0607427B1 EP0607427B1 EP94906744A EP94906744A EP0607427B1 EP 0607427 B1 EP0607427 B1 EP 0607427B1 EP 94906744 A EP94906744 A EP 94906744A EP 94906744 A EP94906744 A EP 94906744A EP 0607427 B1 EP0607427 B1 EP 0607427B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- group
- liquid crystal
- general formula
- diphenyl
- diacetylene
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 76
- 239000000374 eutectic mixture Substances 0.000 title claims abstract description 36
- HMQFJYLWNWIYKQ-UHFFFAOYSA-N 1,4-diphenylbutadiyne Chemical group C1=CC=CC=C1C#CC#CC1=CC=CC=C1 HMQFJYLWNWIYKQ-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 150000001875 compounds Chemical class 0.000 claims abstract description 50
- 230000008018 melting Effects 0.000 claims abstract description 28
- 238000002844 melting Methods 0.000 claims abstract description 28
- 125000003342 alkenyl group Chemical group 0.000 claims abstract description 27
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 23
- 125000003302 alkenyloxy group Chemical group 0.000 claims abstract description 21
- 125000003545 alkoxy group Chemical group 0.000 claims abstract description 13
- 230000004927 fusion Effects 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 abstract description 10
- 239000004983 Polymer Dispersed Liquid Crystal Substances 0.000 abstract description 3
- 230000001419 dependent effect Effects 0.000 description 11
- 238000000034 method Methods 0.000 description 6
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000007704 transition Effects 0.000 description 5
- CYLVUSZHVURAOY-UHFFFAOYSA-N 2,2-dibromoethenylbenzene Chemical compound BrC(Br)=CC1=CC=CC=C1 CYLVUSZHVURAOY-UHFFFAOYSA-N 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000004587 chromatography analysis Methods 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 3
- 239000000741 silica gel Substances 0.000 description 3
- 229910002027 silica gel Inorganic materials 0.000 description 3
- HJUGFYREWKUQJT-UHFFFAOYSA-N tetrabromomethane Chemical compound BrC(Br)(Br)Br HJUGFYREWKUQJT-UHFFFAOYSA-N 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- MZRVEZGGRBJDDB-UHFFFAOYSA-N N-Butyllithium Chemical compound [Li]CCCC MZRVEZGGRBJDDB-UHFFFAOYSA-N 0.000 description 2
- -1 Polysiloxanes Polymers 0.000 description 2
- 125000005082 alkoxyalkenyl group Chemical group 0.000 description 2
- 125000005055 alkyl alkoxy group Chemical group 0.000 description 2
- COQAOQNCXXXVPI-UHFFFAOYSA-N bromoethyne Chemical compound BrC#[C-] COQAOQNCXXXVPI-UHFFFAOYSA-N 0.000 description 2
- LLCSWKVOHICRDD-UHFFFAOYSA-N buta-1,3-diyne Chemical group C#CC#C LLCSWKVOHICRDD-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- RIOQSEWOXXDEQQ-UHFFFAOYSA-N triphenylphosphine Chemical compound C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 RIOQSEWOXXDEQQ-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910021591 Copper(I) chloride Inorganic materials 0.000 description 1
- AVXURJPOCDRRFD-UHFFFAOYSA-N Hydroxylamine Chemical compound ON AVXURJPOCDRRFD-UHFFFAOYSA-N 0.000 description 1
- 229910017912 NH2OH Inorganic materials 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 125000005671 alkyl alkenyl alkyl group Chemical group 0.000 description 1
- 125000005741 alkyl alkenyl group Chemical group 0.000 description 1
- 125000005763 alkyl alkenyloxy group Chemical group 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- HQABUPZFAYXKJW-UHFFFAOYSA-N butan-1-amine Chemical compound CCCCN HQABUPZFAYXKJW-UHFFFAOYSA-N 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 230000021615 conjugation Effects 0.000 description 1
- OXBLHERUFWYNTN-UHFFFAOYSA-M copper(I) chloride Chemical compound [Cu]Cl OXBLHERUFWYNTN-UHFFFAOYSA-M 0.000 description 1
- 210000002858 crystal cell Anatomy 0.000 description 1
- 229940045803 cuprous chloride Drugs 0.000 description 1
- 125000004093 cyano group Chemical group *C#N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005290 field theory Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- LPNYRYFBWFDTMA-UHFFFAOYSA-N potassium tert-butoxide Chemical compound [K+].CC(C)(C)[O-] LPNYRYFBWFDTMA-UHFFFAOYSA-N 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
- C09K19/14—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a carbon chain
- C09K19/18—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a carbon chain the chain containing carbon-to-carbon triple bonds, e.g. tolans
Definitions
- Diphenyl-diacetylene liquid crystals are useful electro-optic media for modulating infrared radiation and for high speed light shutters. These liquid crystal materials possess not only high birefringence but also low rotational viscosity.
- the symmetry and polarity of diphenyl-diacetylene liquid crystals are important to the overall properties of the liquid crystal. Properties, such as melting point (T mp ), birefringence ( ⁇ n), viscosity, threshold voltage (V th ), dielectric anisotropy ( ⁇ ) and heat fusion enthalpy ( ⁇ H), are influenced by the symmetry and polarity of the liquid crystal. These properties are important to the behavior of the liquid crystal in their applications as infrared spatial light modulators and polymer dispersed liquid crystal shutters. A high birefringence improves the light modulation efficiency; low viscosity shortens the response times; and low threshold voltage simplifies the driving electronics in these applications.
- low threshold voltage is particularly attractive for polymer dispersed liquid crystal devices where the applied voltage is partially shielded by the polymer matrix so that the voltage drop across the liquid crystal droplets is far less than the applied voltage.
- Eutectic mixtures of diphenyl-diacetylene liquid crystals are essential to infrared and microwave applications.
- the symmetrical diphenyl-diacetylene liquid crystals exhibit high melting temperatures (nonpolar T mp > 80°C), narrow nematic temperature range ( ⁇ 25 degrees), small dielectric anisotropy ( ⁇ ⁇ 0.8) and large heat fusion enthalpy ⁇ H relative to the ideal hosts for eutectic mixtures.
- High melting temperature is a result of long conjugation and small dielectric anisotropy is a result of high degree of symmetry of the liquid crystal molecules.
- increasing the alkyl chain length tends to reduce the melting point, disadvantageously, the increase in chain length will increase the viscosity and decrease the dielectric anisotropy.
- Polar asymmetrical diphenyl-diacetylene liquid crystals are reported by B. Grant et al., Mol. Cryst. Uq. Cryst, 51 , 209 (1979). These liquid crystals have a cyano group attach to a phenyl group on one side and an alkoxy group attached to another phenyl group on the other side of the diacetylene triple-triple bonds. These compounds show a large dielectric anisotropy, but the melting temperatures of these cyano alkoxy diphenyl-diacetylene homologs are exceedingly high (greater than 150°C) and their nematic range is very narrow (only 5 degrees) relative to the ideal host for eutectic mixtures.
- a new class of liquid crystal compounds which exhibit ideal properties for formulating eutectic mixtures suitable for use in infrared and microwave applications.
- the new class of liquid crystals compounds are based on an asymmetrical diphenyl-diacetylene structure with nonpolar end groups providing the asymmetry. These materials exhibit low melting points, wide nematic temperature range and low heat fusion enthalpy, as described above for an ideal host candidate for eutectic mixtures.
- Eutectic mixtures containing entirely diphenyl-diacetylene homologs using the new compounds according to the invention have high birefringence, low viscosity and wide nematic range.
- the new liquid crystal compounds comprise the following basic structure: R 1 -C 6 H 4 -C ⁇ C-C ⁇ C-C 6 H 4 -R 2 wherein R 1 is an alkyl, alkenyl, alkoxy or alkenyloxy end group and R 2 is alkyl, alkenyl or an alkenyloxy end group.
- R 1 is an alkyl group
- R 1 has the general formula (C n H 2n+1 ); as an alkoxy group, the general formula (OC n H 2n+1 ); as an alkenyl group, the general formula (C n H 2n-1 ); and as an alkenyloxy group, the general formula (OC n H 2n-1 ).
- R 2 When R 2 is an alkyl group, R 2 has the formula (C m H 2m+1 ); as an alkoxy group, the general formula (OC m H 2m+1 ); as an alkenyl group, the general formula (C m H 2m-1 ); and as an alkenyloxy group, the general formula (OC m H 2m-1 ), and wherein n is not equal to m.
- Diphenyl-diacetylene liquid crystal compounds and eutectic mixtures according to the invention exhibit low viscosity of less than about 30 centipoises, high birefringence greater than about 0.25, wide nematic temperature range of 40°C to +80°C, low melting temperatures less than about 40°C, and low heat of fusion enthalpy of less than about 5 kcal/mole.
- Figure 1 is a graphical illustration of wavelength dependent birefringence of a eutectic mixture according to the present invention.
- At least 20 asymmetrical alkyl-alkyl, 5 alkyl-alkoxy, and 5 polar diphenyl-diacetylene liquid crystals were synthesized and their properties were compared to 5 symmetrical diphenyl-diacetylene liquid crystals.
- diphenyl-diacetylene liquid crystals will be abbreviated PTTP-nm, in which P stands for phenyl ring, T stands for triple bond and n and m refer to the number of carbons in the respective alkyl group.
- PTTP-24 refers to a two carbon alkyl group on one end of the phenyl-triple bond-triple bond-phenyl and a four carbon alkyl group on the other end.
- PTTP-n'm or PTTP-n'm' refer to -alkenyl groups.
- the asymmetrical nonpolar diphenyl-diacetylene liquid crystal compounds according to the invention unexpectedly showed a lower melting point and wider nematic temperature range (T c - T mp ) than the symmetrical liquid crystals with the same total chain length. Moreover, the melting temperatures of PTTP-46 and -48 were unexpectedly as low as about 25°C.
- the asymmetrical nonpolar liquid crystal compounds according to the invention have the basic structure: R 1 -C 6 H 4 -C ⁇ C-C ⁇ C-C 6 H 4 -R 2 wherein R 1 and R 2 are nonpolar end groups and R 1 does not equal R 2 , thereby making the diphenyl-diacetylene liquid crystal asymmetrical.
- R 1 and R 2 are taken from Table 1.
- R 1 is an alkyl group
- R 1 preferably has the general formula (C n H 2n+1 ).
- R 1 preferably has the general formula (OC n H 2n+1 ).
- R 1 preferably has the general formula (C n H 2n-1 ); and as an alkenyloxy group, R 1 preferably has the general formula (OC n H 2n-1 ).
- R 2 is an alkyl group, R 2 preferably has the formula (C m H 2m+1 ); the general formula (C m H 2m-1 ) as an alkenyl group; and as an alkenyloxy group, R 2 preferably has the general formula (OC m H 2m-1 ).
- n is not equal to m. n ranges from 1 to 12 and m ranges from 1 to 12.
- R 2 is the same as described above for the first embodiment.
- Table 2 has data for the first embodiment of the invention and other liquid crystal compounds as a comparison.
- a binary eutectic mixture according to the invention was formulated containing 52 weight percent of PTTP-24 and 48 weight percent PTTP-36 (PTTP-24/36).
- the melting point of the mixture dropped to 10°C and the clearing point remained at 97.7°C.
- the nematic temperature range calculated as in J.D. Margerum et al., Mol. Cryst. Liq. Cryst., 111 , 103 (1984) (incorporated herein by reference) ranged from 0 to 98°C.
- the melting point of the eutectic mixture can be lowered further by formulating multi-component PTTP eutectic mixtures using carefully chosen PTTP liquid crystal homologs.
- the birefringence ⁇ n in the infrared region (where ⁇ > > ⁇ *) was calculated ( ⁇ G ⁇ * 2 ) to be 0.285.
- ⁇ G ⁇ * 2 Such a high birefringence ⁇ n makes these materials particularly attractive for modulating IR and microwave radiation where the photostability is not a problem.
- V th ⁇ [K 11 / ⁇ o ⁇ ] 1/2
- K 11 is the splay elastic constant
- ⁇ o is the permittivity of vacuum.
- the data illustrated in Figure 2 includes both the parallel ( ⁇ ⁇ ) and perpendicular ( ⁇ ⁇ ) dielectric constants for PTTP-24/36 (20) and (22), respectively, and for PTTP-48 (21) and (23), respectively.
- the dielectric anisotropy of PTTP-24/36 ( ⁇ is approximately 1) is slightly larger than that of PTTP-48 ( ⁇ is approximately 0.8) at room temperature which corresponds to a reduced temperature T r of approximately 0.84 owing to the shorter chain length.
- the threshold voltages of PTTP-24/36 and -48 were measured by voltage dependent capacitance and voltage dependent birefringence methods (see Wu et al., Liq. Cryst., 10 , 635 (1991) which is incorporated herein by reference). Results obtained from both methods agree to within 2 percent.
- the proportionality constant Ao is found to be 3x10 -11 Newton for both PTTP-24/36 and PTTP-48.
- the viscoelastic coefficient ( ⁇ 1 /K 11 ) was obtained from the decay time of a liquid crystal cell. See for example S. T. Wu et al., Phys. Rev. A 42 , 2219 (1990), which is incorporated herein by reference. Once the viscoelastic coefficient ( ⁇ 1 /K 11 ) was obtained, the rotational viscosity ( ⁇ 1 ) was evaluated by using the K 11 results illustrated in Figure 3. Experimental results of the temperature dependent rotational viscosity ⁇ 1 (T) are illustrated in Figure 4 for PTTP-24/36 and PTTP-48.
- the rotational viscosity ⁇ 1 is a complex function of temperature, as described in Wu et al., Phys. Rev. A, 42 , 2219 (1990) and M. Osipov et al., Z. Naturforsch. Part A 44 , 785 (1989), both incorporated herein by reference, because the rotational viscosity ⁇ 1 depends not only on the absolute temperature, but also on the reduced temperature (T r ). From Figure 4, PTTP-48 exhibits a larger rotational viscosity than PTTP-24/36 mixture at a given reduced temperature (T r ). This is because PTTP-48 possesses a larger moment of inertia due to its longer chain length.
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Liquid Crystal Substances (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Claims (12)
- Composé à cristal liquide diphényl-diacétylène, comprenant :
la structure générale de formule
R1-C6H4-C≡C-C≡C-C6H4-R2
dans laquelleR1 est choisi parmi les groupes non polaires consistant en un groupe alkyle répondant à la formule générale (CnH2n+1), un groupe alkoxy répondant à la formule générale (OCnH2n+1), n ayant une valeur de 1 à 12 ; un groupe alcényle répondant à la formule générale (CnH2n-1) et un groupe alcényloxy répondant à la formule générale (OCnH2n-1), n ayant une valeur de 1 à 12 ;R2 est choisi parmi les groupes non polaires consistant en un groupe alkyle répondant à la formule générale (CmH2m+1), dans laquelle m a une valeur de 1 à 12 ; un groupe alcényle répondant à la formule générale (CmH2m-1) et un groupe alcényloxy répondant à la formule générale (OCmH2m-1), m ayant une valeur de 1 à 12 ; etn n'est pas égal à m. - Composé à cristal liquide diphényl-diacétylène suivant la revendication 1, caractérisé en ce que l'un des groupes R1 et R2 est un groupe alcényle répondant à la formule générale CxH2x+1CH=CH-(CH2)n-2-x dans laquelle n a une valeur de 2 à 12 et x a une valeur de 0 à 10.
- Composé à cristal liquide diphényl-diacétylène suivant la revendication 1, caractérisé en ce-que R1 représente un groupe alcényle répondant à la formule générale CxH2x+1CH=CH-(CH2)n-2-x et R2 représente un groupe alcényle répondant à la formule générale CyH2y+1CH=CH-(CH2)n-2-y formules dans lesquelles n a une valeur de 2 à 12, x et y ont des valeurs de 0 à 10 et x n'est pas égal à y.
- Composé à cristal liquide diphényl-diacétylène suivant l'une quelconque des revendications 1 à 3, caractérisé par une faible viscosité inférieure à environ 30 centipoises et une forte biréfringence (Δn) supérieure à environ 0,25, une basse température de fusion inférieure à environ 40°C, un large plage de températures nématiques de - 40°C à +80°C et une faible chaleur d'enthalpie de fusion inférieure à environ 5 kcal/mole pour des applications en infrarouge et à micro-ondes.
- Composé à cristal liquide diphényl-diacétylène suivant la revendication 4, caractérisé en ce qu'il est choisi dans le groupe consistant en l'éthylbutyldiphényl-diacétylène, le propylhexyldiphényl-diacétylène, le butylhexyldiphényl-diacétylène, le butyloctyldiphényldiacétylène et l'hexyloctyldiphényl-diacétylène.
- Mélange eutectique de composés à cristaux liquides comprenant :
un premier composé à cristal liquide diphényl-diacétylène ayant la structure générale :
R1-C6H4-C≡C-C≡C-C6H4-R2
dans laquelleR1 est choisi parmi les groupes non polaires consistant en un groupe alkyle répondant à la formule générale (CnH2n+1), un groupe alkoxy répondant à la formule générale (OCnH2n+1), n ayant une valeur de 1 à 12 ; un groupe alcényle répondant à la formule générale (CnH2n-1) et un groupe alcényloxy répondant à la formule générale (OCnH2n-1), n ayant une valeur de 1 à 12 ;R2 est choisi parmi les groupes- non polaires consistant en un groupe alkyle répondant à la formule générale (CmH2m+1), dans laquelle m a une valeur de 1 à 12 ; un groupe alcényle répondant à la formule générale (CmH2m-1) et un groupe alcényloxy répondant à la formule générale (OCmH2m-1), m ayant une valeur de 1 à 12 ; etn n'est pas égal à m ; etun second composé à cristal liquide diphényl-diacétylène ayant la structure générale :
R1'-C6H4-C≡C-C≡C-C6H4-R2'
dans laquelleR1' est choisi parmi les groupes non polaires consistant en un groupe alkyle répondant à la formule générale (Cn'H2n'+1), un groupe alkoxy répondant à la formule générale (OCn'H2n'+1), n' ayant une valeur de 1 à 12 ; un groupe alcényle répondant à la formule générale (Cn'H2n'-1) et un groupe alcényloxy répondant à la formule générale (OCn'H2n'-1), n' ayant une valeur de 1 à 12, ou parmi le groupe polaire consistant en CN, CI et F ; etR2' est choisi parmi les groupes non polaires consistant en un groupe alkyle répondant à la formule générale (Cm'H2m'+1), dans laquelle m' a une valeur de 1 à 12 ; un groupe alcényle répondant à la formule générale (Cm'H2m'-1) et un groupe alcényloxy répondant à la formule générale (OCm'H2m'-1), m' ayant une valeur de 1 à 12, ou bien R2' est choisi parmi les groupes polaires consistant en CN, Cl et F. - Mélange eutectique suivant la revendication 6, caractérisé par une faible viscosité inférieure à environ 30 centipoises et une forte biréfringence (Δn) supérieure à environ 0,25, une basse température de fusion inférieure à environ 40°C, une large plage de températures nématiques de -40°C à +80°C et une faible chaleur d'enthalpie de fusion inférieure à environ 5 kcal/mole.
- Mélange eutectique de composés à cristaux liquides suivant la revendication 6 ou 7, caractérisé en ce que R1' et R2' sont les groupes non polaires, R1' n'est pas égal à R2' et R1' et R2' ne sont pas égaux à R1 et R2.
- Mélange eutectique de composés à cristaux liquides suivant l'une quelconque des revendications 6 à 8, caractérisé en ce que le premier composé à cristal liquide consiste en éthylbutyldiphényl-diacétylène et le second composé à cristal liquide consiste en propylhexyldiphényldiacétylène.
- Mélange eutectique de composés à cristaux liquides suivant l'une quelconque des revendications 6 à 9, caractérisé en ce qu'au moins un des groupes R1' et R2' est le groupe polaire et R1' n'est pas égal à R2'.
- Mélange eutectique de composés à cristaux liquides suivant la revendication 10, caractérisé en ce que R1' est choisi dans le groupe consistant en les groupes alkyle, alkoxy, alcényle et alcényloxy et R2' est choisi dans le groupe consistant en CN, CI et F.
- Mélange eutectique de composés à cristaux liquides suivant l'une quelconque des revendications 6 à 11, caractérisé en ce R1' et R2' sont les groupes polaires et R1' est égal à R2'.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US927698 | 1992-08-10 | ||
| US07/927,698 US5338481A (en) | 1992-08-10 | 1992-08-10 | Asymmetrical nonpolar diphenyl-diacetylene liquid crystals eutectic mixtures |
| PCT/US1993/007486 WO1994003556A1 (fr) | 1992-08-10 | 1993-08-09 | Cristaux liquides de diphenyle-diacetylene asymetriques non polaires et melanges eutectiques |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0607427A1 EP0607427A1 (fr) | 1994-07-27 |
| EP0607427B1 true EP0607427B1 (fr) | 1997-09-17 |
Family
ID=25455106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94906744A Expired - Lifetime EP0607427B1 (fr) | 1992-08-10 | 1993-08-09 | Cristaux liquides de diphenyle-diacetylene asymetriques non polaires et melanges eutectiques |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5338481A (fr) |
| EP (1) | EP0607427B1 (fr) |
| JP (1) | JP2558084B2 (fr) |
| DE (1) | DE69314001T2 (fr) |
| WO (1) | WO1994003556A1 (fr) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100311921B1 (ko) * | 1993-10-13 | 2002-10-31 | 스미또모 가가꾸 고오교오 가부시끼가이샤 | 톨란화합물,그의제조방법,이화합물을유효성분으로하는액정조성물및이액정조성물을사용하여이루어진액정소자 |
| TW347412B (en) * | 1994-10-05 | 1998-12-11 | Sumitomo Kagaku Kk | Liquid crystal compositions and a liquid crystal element containing the same |
| JPH08259474A (ja) * | 1995-03-23 | 1996-10-08 | Chisso Corp | 共役炭素鎖を有する液晶性化合物および液晶組成物 |
| US5963291A (en) * | 1997-07-21 | 1999-10-05 | Chorum Technologies Inc. | Optical attenuator using polarization modulation and a feedback controller |
| WO2001060946A2 (fr) * | 2000-02-15 | 2001-08-23 | Hrl Laboratories, Llc | Cristaux liquides de diphenyldiacetylenes polaires |
| US6312618B1 (en) | 2000-04-03 | 2001-11-06 | Hrl Laboratories | Polar diphenyldiacetylene liquid crystals |
| US6495066B1 (en) | 2000-07-12 | 2002-12-17 | Raytheon Company | Dopants for improving the thermal and UV stability of high birefringence liquid crystals |
| US6468443B1 (en) | 2000-07-21 | 2002-10-22 | Raytheon Company | Colorless and low viscosity compounds for low voltage liquid crystal operation |
| US6838017B1 (en) | 2000-09-05 | 2005-01-04 | Hrl Laboratories, Llc | Polar tolane liquid crystals |
| DE102004029429B4 (de) | 2003-07-11 | 2019-04-04 | Merck Patent Gmbh | Bauelemente für die Hochfrequenztechnik |
| US8173045B2 (en) | 2008-05-28 | 2012-05-08 | University Of Washington | Diels-Alder crosslinkable dendritic nonlinear optic chromophores and polymer composites |
| DE102010045370A1 (de) * | 2009-09-25 | 2011-04-14 | Merck Patent Gmbh | Bauteile für die Hochfrequenztechnik und Flüssigkristalline Medien |
| DE102011119900A1 (de) | 2011-01-21 | 2012-07-26 | Merck Patent Gmbh | Flüssigkristalline Medien, Bauteile für die Hochfrequenztechnik und mesogene Verbindungen |
| KR20140018895A (ko) | 2011-02-15 | 2014-02-13 | 고쿠리츠다이가쿠호진 토쿄고교 다이가꾸 | 디아세틸렌 유도체 및 디아세틸렌 구조를 가진 액정성 중합체 |
| CN102517036B (zh) * | 2011-12-12 | 2014-06-18 | 北京科技大学 | 一种联炔苯液晶化合物 |
| DE102013020203A1 (de) * | 2013-11-30 | 2015-06-03 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Elektronische Kamera und diese verwendendes Kraftfahrzeug |
| US20160208170A1 (en) * | 2015-01-20 | 2016-07-21 | Merck Patent Gmbh | Liquid-crystalline medium |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4005882A1 (de) * | 1989-01-18 | 1991-08-29 | Merck Patent Gmbh | Fluorhaltige aromaten |
-
1992
- 1992-08-10 US US07/927,698 patent/US5338481A/en not_active Expired - Lifetime
-
1993
- 1993-08-09 DE DE69314001T patent/DE69314001T2/de not_active Expired - Fee Related
- 1993-08-09 WO PCT/US1993/007486 patent/WO1994003556A1/fr not_active Ceased
- 1993-08-09 EP EP94906744A patent/EP0607427B1/fr not_active Expired - Lifetime
- 1993-08-09 JP JP6505613A patent/JP2558084B2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US5338481A (en) | 1994-08-16 |
| DE69314001D1 (de) | 1997-10-23 |
| EP0607427A1 (fr) | 1994-07-27 |
| JPH07502780A (ja) | 1995-03-23 |
| JP2558084B2 (ja) | 1996-11-27 |
| DE69314001T2 (de) | 1998-04-16 |
| WO1994003556A1 (fr) | 1994-02-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0607427B1 (fr) | Cristaux liquides de diphenyle-diacetylene asymetriques non polaires et melanges eutectiques | |
| JP4896795B2 (ja) | 液晶相 | |
| JP5084993B2 (ja) | 液晶媒体 | |
| US6066268A (en) | Liquid-crystalline medium | |
| KR101547359B1 (ko) | 액정 매질 | |
| KR101468828B1 (ko) | 액정 매질 | |
| US4849130A (en) | Liquid crystalline ethane derivatives, their preparation and the liquid crystal compositions containing same | |
| TWI386481B (zh) | 液晶介質 | |
| TWI504732B (zh) | 液晶介質 | |
| EP0318003B1 (fr) | Composition liquide cristalline pour mode nématique torsade | |
| EP0825176B1 (fr) | Dérivés d'azine, procédé pour leur préparation, composition de cristaux liquides nématiques et dispositif d'affichage à cristaux liquides les comprenant | |
| JP2000038585A (ja) | 液晶媒体 | |
| TWI460253B (zh) | 液晶介質 | |
| JP5105669B2 (ja) | 液晶化合物、液晶媒体および液晶ディスプレイ | |
| Takatsu et al. | Physical properties of nematic tolans | |
| KR20050085088A (ko) | 액정 매질 | |
| JP2001019649A (ja) | 6−フルオロナフタレン誘導体である新規液晶性化合物とそれを含有する液晶組成物 | |
| KR100845995B1 (ko) | 액정 매질 | |
| CA2082800A1 (fr) | Melange organique anisotrope | |
| KR20010062246A (ko) | 액정 매질 | |
| JPS63502599A (ja) | 電気光学表示素子 | |
| KR102487931B1 (ko) | 액정 매질 | |
| JPH04224885A (ja) | 電気的に制御される複屈折の原理に基づく液晶ディスプレー及び液晶混合物 | |
| GB2300642A (en) | Liquid crystalline medium based on a mixture of polar compounds having negative dielectric anisotropy | |
| JP3554577B2 (ja) | 液晶媒体 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 19940518 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: HUGHES AIRCRAFT COMPANY |
|
| 17Q | First examination report despatched |
Effective date: 19951010 |
|
| GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR GB |
|
| REF | Corresponds to: |
Ref document number: 69314001 Country of ref document: DE Date of ref document: 19971023 |
|
| ET | Fr: translation filed | ||
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: 732E |
|
| 26N | No opposition filed | ||
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: TP Ref country code: FR Ref legal event code: CD Ref country code: FR Ref legal event code: CA |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20020708 Year of fee payment: 10 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20020712 Year of fee payment: 10 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20020724 Year of fee payment: 10 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20030809 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20040302 |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20030809 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20040430 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |